Title :
Truncated orthogonal expansions of recurrent signals: equivalence to a periodic time-variant filter
Author :
Olmos, Salvador ; GarcÌa, Josè ; Laguna, Pablo ; Janè, Raimon
Author_Institution :
Dept. of Electron. & Commun. Eng., Zaragoza Univ., Spain
Abstract :
In this work we show that orthogonal expansions of recurrent signals like electrocardiograms with a reduced number of coefficients can be considered as a periodic time-variant filter. Instantaneous impulse and frequency responses are analyzed for two cases: estimation of the coefficients with inner product and adaptive estimation with LMS algorithm
Keywords :
adaptive estimation; electrocardiography; frequency response; least mean squares methods; medical signal processing; time-varying filters; transient response; ECG; LMS algorithm; adaptive estimation; coefficient estimation; electrocardiograms; frequency response; impulse response; inner product; periodic time-variant filter; recurrent signals; truncated orthogonal expansions; Algorithm design and analysis; Electrocardiography; Equations; Filters; Fourier transforms; Frequency; Independent component analysis; Least squares approximation; Signal analysis; Wavelet transforms;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.681787
